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  <title>返回输出缓冲区内容的长度</title>
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  <div id="layout-content"><div id="function.ob-get-length" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">ob_get_length</h1>
  <p class="verinfo">(PHP 4 &gt;= 4.0.2, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">ob_get_length</span> &mdash; <span class="dc-title">返回输出缓冲区内容的长度</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.ob-get-length-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>ob_get_length</strong></span>
    ( <span class="methodparam">void</span>
   ) : <span class="type">int</span></div>

  <p class="para rdfs-comment">
   此函数将返回输出缓中冲区内容的长度。
  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.ob-get-length-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   返回输出缓冲区内容的长度；或者返回<strong><code>FALSE</code></strong>——如果没有起作用的缓冲区。
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.ob-get-length-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-478">
    <p><strong>Example #1 A simple <span class="function"><strong>ob_get_length()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br />ob_start</span><span style="color: #007700">();<br /><br />echo&nbsp;</span><span style="color: #DD0000">"Hello&nbsp;"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$len1&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">ob_get_length</span><span style="color: #007700">();<br /><br />echo&nbsp;</span><span style="color: #DD0000">"World"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$len2&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">ob_get_length</span><span style="color: #007700">();<br /><br /></span><span style="color: #0000BB">ob_end_clean</span><span style="color: #007700">();<br /><br />echo&nbsp;</span><span style="color: #0000BB">$len1&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #DD0000">",&nbsp;."&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">$len2</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
6, 11
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.ob-get-length-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="ob_start.html" class="function" rel="rdfs-seeAlso">ob_start()</a> - 打开输出控制缓冲</span></li>
    <li class="member"><span class="function"><a href="ob_get_contents.html" class="function" rel="rdfs-seeAlso">ob_get_contents()</a> - 返回输出缓冲区的内容</span></li>
   </ul>
  </p>
 </div>


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